You can no longer link
or link --force
for curl. To be able to use the brew install curl.
You will get the following message.
$ brew link curl --force
Warning: Refusing to link macOS provided/shadowed software: curl
To be able to use brew's installed curl is to add the following to the bottom of your ~/.bash_profile
or ~/.profile
or ~/.bashrc
export PATH="/usr/local/opt/curl/bin:$PATH"
Also to have Homebrew use the brew installed curl also add this to your profile.
# homebrew curl
export HOMEBREW_FORCE_BREWED_CURL=1